package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@Slf4j
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        dishService.saveWithFlavor(dishDto);

        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    @GetMapping("/page")
    public R<Page> page(Integer page,Integer pageSize,String name){
        Page<Dish> dishPage = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.like(name != null,Dish::getName,name);
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(dishPage,queryWrapper);

        BeanUtils.copyProperties(dishPage,dishDtoPage,"records");
        List<Dish> records = dishPage.getRecords();
        List<DishDto> list = records.stream().map((item) ->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if (category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }

    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
        redisTemplate.delete(keys); //删除这些key

        return R.success("修改成功");
    }

    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId,ids);
        dishService.removeByIds(ids);

        LambdaQueryWrapper<DishFlavor> dflqw = new LambdaQueryWrapper<>();
        dflqw.in(DishFlavor::getDishId,ids);
        List<DishFlavor> list = dishFlavorService.list(dflqw);
        for (DishFlavor dishFlavor : list) {
            dishFlavorService.removeById(dishFlavor.getId());
        }
        return R.success("删除成功");
    }

    @PostMapping("/status/{status}")
    public R<String> updateStatus (@PathVariable Integer status,@RequestParam List<Long> ids){
        for (Long id : ids) {
            LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
            lqw.eq(Dish::getId,id);
            Dish dish = dishService.getOne(lqw);
            dish.setStatus(status);
            String s = "dish_" + dish.getCategoryId();
            redisTemplate.delete(s);
            dishService.updateById(dish);
        }
        return R.success("修改成功");
    }

    @GetMapping("/list")
    public R<List<DishDto>> list(Long categoryId){

        String key = "dish_" + categoryId;
         //先从redis中获取缓存数据
        List<DishDto> dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        LambdaQueryWrapper<Dish> dlqw = new LambdaQueryWrapper<>();
        dlqw.eq(categoryId != null,Dish::getCategoryId,categoryId);
        dlqw.eq(Dish::getStatus,1);
        dlqw.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> dishList = dishService.list(dlqw);
        dishDtoList =dishList.stream().map(item -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId1 = item.getCategoryId();
            Category category = categoryService.getById(categoryId1);
            if (category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> dflqw = new LambdaQueryWrapper<>();
            dflqw.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(dflqw);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());

        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }
}
